CVE-2026-19943Gutenverse <= 4.0.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'titleTag' Block Attribute
Updated under an hour ago ()
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It affects jegstudio Gutenverse – WordPress Blocks, Page Builder & Site Editor. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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The Gutenverse – WordPress Blocks, Page Builder & Site Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'titleTag' Block Attribute in all versions up to, and including, 4.0.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The malicious titleTag value survives wp_kses_post on save because it is stored inside a block-comment delimiter and the live HTML is only synthesized at render time by do_blocks(), meaning the payload also fires in administrator and editor sessions during post preview.
- CVSS
- 6.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
- Weakness (CWE)
- CWE-79
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Wordfence
- NVD analysis
- Deferred
- Record last updated
- Aug 25, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
jegstudio Gutenverse – WordPress Blocks, Page Builder & Site Editor jegstudio:gutenverse_wordpress_blocks_page_builder_and_site_editor (from the name) | through 4.0.2 | CNA record |
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/b7eb4cac-cf16-438e-81cc-516646e77cdc?source=cve
- https://plugins.trac.wordpress.org/browser/gutenverse/tags/4.0.0/includes/block/class-chart.php#L80
- https://plugins.trac.wordpress.org/browser/gutenverse/tags/4.0.2/includes/block/class-chart.php#L80
- https://plugins.trac.wordpress.org/browser/gutenverse/tags/4.0.2/includes/block/class-chart.php#L28
- https://plugins.trac.wordpress.org/browser/gutenverse/tags/4.0.0/includes/block/class-chart.php#L28
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3662715%40gutenverse&new=3662715%40gutenverse
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.